There is a reason that luggage has to be weighed. If you watch Mentour Pilot, there's a not insignificant number of plane accidents (and outright disasters) that occur due to the plane weight being calculated incorrectly, and thereby running out of fuel.
Carry-on luggage is usually not weighed, there are simply safety margins in place for that sort of thing. (A human probably isn't capable of carrying a bag heavy enough to erode those margins.)
And fuel burn is the least of the concerns when it comes to weight - a far bigger issue is how it affects balance and engine lift. But on a plane the size of a jet airliner, this too is almost never a real concern when it comes to passenger weight - a standard weight is just assumed for each passenger and their carryon. (It's a concern for cargo weight, but that's why cargo is always weighed and balanced properly.)
Maybe if the airline notices that all the passengers are sitting on the left (for some strange reason) or something like that, they would reseat people.
> Maybe if the airline notices that all the passengers are sitting on the left (for some strange reason) or something like that, they would reseat people.
I was on a turboprop plane when they made a few people switch seats to balance the weight: the seats were arranged Seat - Aisle - Seat - Seat , and all the singles on the left side were filled to the back, with only a few seats on the right side taken.
Cant recall ever being weighed as a passenger and in this day and age you have passengers who are 120 lbs and 300 lbs yet you get penalized if your suitcase is 1 lbs over the limit.
And fuel burn is the least of the concerns when it comes to weight - a far bigger issue is how it affects balance and engine lift. But on a plane the size of a jet airliner, this too is almost never a real concern when it comes to passenger weight - a standard weight is just assumed for each passenger and their carryon. (It's a concern for cargo weight, but that's why cargo is always weighed and balanced properly.)
Maybe if the airline notices that all the passengers are sitting on the left (for some strange reason) or something like that, they would reseat people.